CN110895096A - Device for accurately and uniformly adjusting air flow and efficient tobacco leaf dehumidifying and drying device - Google Patents
Device for accurately and uniformly adjusting air flow and efficient tobacco leaf dehumidifying and drying device Download PDFInfo
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- CN110895096A CN110895096A CN201911297012.4A CN201911297012A CN110895096A CN 110895096 A CN110895096 A CN 110895096A CN 201911297012 A CN201911297012 A CN 201911297012A CN 110895096 A CN110895096 A CN 110895096A
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- 238000001035 drying Methods 0.000 title claims abstract description 59
- 241000208125 Nicotiana Species 0.000 title claims abstract description 30
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 30
- 238000009423 ventilation Methods 0.000 claims abstract description 105
- 239000011148 porous material Substances 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000003570 air Substances 0.000 claims description 220
- 239000012080 ambient air Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000003507 refrigerant Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007791 dehumidification Methods 0.000 description 15
- 230000007246 mechanism Effects 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
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- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/004—Heating arrangements using waste heat recovered from dryer exhaust gases by compressing and condensing vapour in exhaust gases, i.e. using an open cycle heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/22—Tobacco leaves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
An air flow accurate and uniform adjusting device and a tobacco leaf efficient dehumidifying and drying device. The invention discloses an accurate and uniform air flow adjusting device and a high-efficiency dehumidifying and drying device, which comprise: a first orifice plate having a plurality of ventilation zones disposed therein; the second pore plate is provided with air distribution ports at positions corresponding to the ventilation areas of the first pore plate, and the air distribution ports have the same side contour as that of the corresponding ventilation areas; the second pore plate and the first pore plate are overlapped, and each air distribution opening corresponds to each ventilation area one by one; the second orifice plate and the first orifice plate can move relatively, and the overlapped part of each ventilation area and the air distribution opening is changed in the relative movement process to realize the adjustment of the air flow. According to the accurate and uniform air flow adjusting device provided by the invention, the plurality of ventilation areas are uniformly distributed on the first pore plate, the plurality of air distribution ports are correspondingly arranged on the second pore plate, and the ventilation area of each ventilation area of the first pore plate is adjusted through the mutual movement between the two pore plates, so that the total flow of the plurality of ventilation areas of the first pore plate is adjusted, the air flow on the ventilation section is uniformly distributed, and the accurate and uniform air flow adjustment is realized.
Description
Technical Field
The invention relates to the technical field of heat pump system design, in particular to an accurate and uniform air flow adjusting device and a high-efficiency tobacco leaf dehumidifying and drying device.
Background
The air is the most important material condition for human life to continue, and the air is also the physical platform for industrial work such as refrigeration, dehumidification, heating, humidification, heat preservation, drying, air separation and the like. In some production links and living places, air is required to be used and the gas flow is accurately regulated and controlled.
Since the fluidity of the gas is excellent, and the density, viscosity coefficient, reynolds number and the like of the thermal physical properties of the marker gas change along with the change of the temperature and the pressure of the gas, in general, compared with the measurement and the regulation of the flow of solid particles and liquid substances, the method and the means for measuring and regulating the flow of the gas are more complicated and the measurement and the regulation precision is lower.
The problem of accurate adjustment of gas flow required by production links and living places is solved, and the problem becomes an important problem in the field of hydrodynamics.
Disclosure of Invention
To solve the problems in the background art, the present invention provides an accurate and uniform air flow rate adjusting device, comprising:
a first orifice plate having a plurality of vent areas disposed thereon;
the second pore plate is provided with air distribution ports at positions corresponding to the ventilation areas on the first pore plate, and the air distribution ports can cover the ventilation areas;
the second pore plate and the first pore plate are overlapped, and each air distribution opening corresponds to each ventilation area one by one; the second orifice plate and the first orifice plate can move relatively, and the overlapping part of each ventilation area and the air distribution opening is changed in the relative movement process, so that the adjustment of the air flow is realized.
Preferably, a plurality of the ventilation areas are uniformly distributed along the transverse direction or the longitudinal direction of the first pore plate at intervals, and a plurality of the air distribution openings are uniformly distributed along the transverse direction or the longitudinal direction of the second pore plate at intervals; and the ventilation area and the air distribution opening have the same shape, size and outline.
Preferably, the ventilation area and the air distribution opening are rectangular.
Preferably, a moving direction between the first orifice plate and the second orifice plate is along an arrangement direction of the ventilation areas.
Preferably, the distance between the adjacent ventilation areas is equal to the distance between the adjacent air distribution openings;
and the distance between every two adjacent air distribution openings is greater than or equal to the size of the ventilation area in the moving direction between the first pore plate and the second pore plate.
Preferably, at least one vent hole is arranged on the vent area.
Preferably, the ventilation area is evenly provided with at least one row of ventilation holes, and each row of ventilation holes is evenly provided with a plurality of ventilation holes.
Preferably, the device also comprises a driving device;
the first orifice plate is a fixed orifice plate, the second orifice plate is a movable orifice plate, the fixed orifice plate is fixed on the section of the air channel needing to regulate the air flow, the movable orifice plate is movably arranged on the fixed orifice plate, and the driving device drives the movable orifice plate to move relative to the fixed orifice plate.
The invention also provides a high-efficiency dehumidifying and drying device, which comprises an airflow channel with an air inlet and an air outlet, wherein at least one group of heat pump units are arranged in the airflow channel, and each heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation; the air inlet is provided with the device for accurately and uniformly adjusting the air flow;
and moist air enters the airflow channel from the air inlet, sequentially passes through the evaporator for cooling and dehumidifying, is heated by the condenser to become dry air, and is discharged from the air outlet.
The invention also provides a tobacco leaf high-efficiency dehumidifying and drying device, which comprises a drying airflow circulation channel which is provided with an air inlet and an air outlet and is connected with a heat pump unit used as a heat source and a drying space for evaporating moisture in tobacco leaves, wherein at least one set of heat pump unit condensers are arranged in the airflow circulation channel; the evaporators are all located in ambient air outside the airflow circulating channel, and the condensers are all located in the circulating channel;
the invention provides a high-efficiency tobacco leaf dehumidifying and drying device.A fresh air port and a moisture discharging port are arranged on an air flow circulation channel, and the fresh air port and the moisture discharging port are provided with the devices for accurately and uniformly adjusting the air flow;
preferably, the size of the vent hole on the first pore plate on the moisture exhaust opening is smaller than that of the vent hole on the first pore plate on the fresh air opening.
Preferably, the tobacco leaf drying device further comprises a tobacco leaf drying space, and an air inlet and an air outlet of the airflow circulating channel are communicated with the drying space to form an airflow closed-loop circulating drying channel.
Preferably, the evaporator is disposed opposite to the moisture discharge port.
Preferably, the second orifice plate on the moisture exhaust port and the second orifice plate on the fresh air port share one driving device, and are synchronously opened and closed.
Preferably, the moisture-discharging airflow bundle group emitted by the plurality of groups of ventilation hole clusters on the first pore plate of the moisture-discharging port is uniformly emitted to the windward side of the evaporator of the heat pump unit.
Preferably, a first fan is arranged in the airflow circulating air duct and close to the air outlet.
Preferably, a second fan is disposed at one side of the evaporator.
Preferably, a third fan is arranged in the airflow circulating air duct and close to the moisture exhaust port.
Compared with the prior art, the accurate and uniform air flow adjusting device and the efficient dehumidifying and drying device provided by the invention have the following advantages and positive effects:
1. even air distribution
Because a large number of vent holes are uniformly and densely distributed on a plurality of cluster type vent areas on the first pore plate, no matter how many rows of vent holes of the plurality of vent areas are covered by the solid plate area between the air distribution openings of the second pore plate, the plurality of rows of vent holes of the plurality of cluster type vent areas which are not covered and leak out are still uniformly distributed on the whole vent section in view of the whole first pore plate area, thereby ensuring the uniformity of air flow on the air duct section;
2. accurate air distribution quantity
A plurality of cluster type ventilation areas are uniformly and densely distributed on the first pore plate, and a certain number of ventilation holes which can be penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device like a sieve mesh;
the number of the ventilation holes is accurately reserved by covering the ventilation holes of a plurality of cluster type ventilation areas on the first pore plate by the solid plate area between the air distribution ports of the second pore plate, so that the air flow can be accurately controlled;
3. small sliding distance and simple driving mechanism
Because the second pore plate with a plurality of large rectangular square holes is adopted to cooperate with the first pore plate with a plurality of cluster type ventilation areas, the ventilation surface where the whole first pore plate is positioned is decomposed into a plurality of repeated 'stepping' areas; therefore, each repeated stepping area (namely the cluster type ventilation area) is narrow when viewed from the sliding direction of the special second orifice plate, thereby bringing the technical effects of small sliding distance and simple driving mechanism.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic exploded view of a device for precisely and uniformly adjusting the air flow rate in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram showing the mass flow rate of the device for precisely and uniformly adjusting the air flow rate in embodiment 1 of the present invention;
FIG. 3 is a schematic view of the medium flow rate of the device for precisely and uniformly adjusting the air flow rate in embodiment 1 of the present invention;
FIG. 4 is a small flow rate diagram of an apparatus for the precise and uniform adjustment of air flow rate in embodiment 1 of the present invention;
FIG. 5 is a schematic zero-flow diagram of an apparatus for precise and uniform adjustment of air flow in embodiment 1 of the present invention;
FIG. 6 is a schematic diagram of an apparatus for precisely and uniformly adjusting the air flow rate in embodiment 1 of the present invention;
fig. 7 is a schematic structural diagram of an efficient dehumidifying and drying apparatus in embodiment 3 of the present invention;
FIG. 8 is a schematic structural view of a fixed orifice plate in example 3 of the present invention;
fig. 9 is a schematic structural view of a movable orifice plate in embodiment 3 of the present invention.
Fig. 10 is a schematic structural view of a device for accurately and uniformly adjusting the air flow rates on the moisture exhaust port and the fresh air port in embodiment 3 of the invention.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
Example 1
Referring to fig. 1 to 5, the invention provides an accurate and uniform air flow regulating device, which comprises a first orifice plate 1 and a second orifice plate 2, wherein a plurality of ventilation areas 101 are arranged on the first orifice plate 1; air distribution openings 201 are formed in the positions, corresponding to the ventilation areas 101, of the second pore plate 2, and the air distribution openings 201 can cover the ventilation areas; the second pore plate 2 and the first pore plate 1 are overlapped, and each air distribution opening 201 corresponds to each ventilation area 101 one by one; the second orifice plate 2 and the first orifice plate 1 can move relatively, and the overlapping part of each ventilation area 101 and the air distribution opening 201 is changed in the relative movement process, so that the air flow is adjusted.
According to the accurate and uniform air flow adjusting device provided by the invention, the plurality of ventilation areas are uniformly distributed on the first pore plate, the plurality of air distribution openings are correspondingly arranged on the second pore plate, and the ventilation areas of the first pore plate are adjusted through the mutual movement between the two pore plates, so that the flow of the ventilation areas of the first pore plate is adjusted, the total flow of the ventilation areas of the first pore plate is adjusted, the air flow on a ventilation section is uniformly distributed, and the accurate and uniform air flow adjustment is realized.
In this embodiment, a plurality of ventilation areas 101 are uniformly distributed along the longitudinal direction of the first pore plate 1, and a plurality of air distribution openings 201 are uniformly distributed along the longitudinal direction of the second pore plate 2; of course, in other embodiments, the plurality of ventilation areas 101 may be uniformly distributed along the lateral direction of the first perforated plate 1, and the plurality of air distribution openings 201 may be uniformly distributed along the lateral direction of the second perforated plate 2, as shown in fig. 6, which is not limited herein.
Wherein, the shape and size of the ventilation area 101 and the air distribution opening 201 are the same; of course, in other embodiments, the size of the air distribution opening 201 may be larger or smaller than the size of the ventilation area 101, and may be selected according to specific situations, and is not limited herein.
In this embodiment, the ventilation area and the air distribution opening are rectangular. The ventilation area 101 and the air distribution opening 201 are arranged in a rectangular shape in this embodiment to facilitate uniform adjustment of the ventilation area. Of course, in other embodiments, the shapes of the ventilation area 101 and the air distribution opening 201 may be other polygonal shapes or irregular shapes, which is not limited herein.
Further, in the present embodiment, the moving direction between the second orifice plate and the first orifice plate is along the arrangement direction of the ventilation areas.
Further, the distance between the adjacent ventilation areas 101 is equal to the distance between the adjacent air distribution openings 201; the distance between the adjacent air distribution openings 201 is larger than or equal to the size of the ventilation area 101 in the moving direction between the first orifice plate and the second orifice plate. This arrangement is advantageous to ensure that the complete closure of the ventilation zone 101 on the first orifice plate 1 by the second orifice plate achieves zero flow.
In this embodiment, at least one vent hole 102 is arranged on the ventilation area 101, at least one row of vent holes 102 is uniformly distributed on the preferred ventilation area 101, and each row of vent holes is uniformly distributed with a plurality of vent holes, as shown in fig. 1, so that the design is favorable for the accurate and uniform adjustment of the air volume. Further ventilation holes 102 are preferably circular holes. Of course, in other embodiments, the number and shape of the vent holes 102 in the vent area 101 can be adjusted according to specific situations, and are not limited herein.
In the embodiment, the first orifice plate 1 is a fixed orifice plate, the second orifice plate 2 is a movable orifice plate, the fixed orifice plate is fixed on the section of the air duct needing to regulate the air flow, and the movable orifice plate is movably arranged on the fixed orifice plate; the device also comprises a driving device which drives the movable orifice plate to move relative to the fixed orifice plate.
Of course, in other embodiments, the first orifice plate may also be a movable orifice plate, the second orifice plate may also be a fixed orifice plate, and the driving device drives the first orifice plate to move relative to the second orifice plate, which is not limited herein and may be adjusted according to specific situations.
The operation of the device for the precise and uniform regulation of the air flow is further described below with reference to fig. 2 to 5:
1. as shown in fig. 2, each ventilation area 101 on the first orifice plate 1 is directly opposite to each air distribution opening on the second orifice plate 2, and the ventilation holes 102 on the ventilation area 101 are all leaked, not shielded and in a ventilation state, and the air flow reaches the maximum at the moment;
2. as shown in fig. 3, the second orifice plate 2 moves downward a short distance relative to the first orifice plate 1, the second orifice plate 2 covers the uppermost row of vent holes 102 of each ventilation area 101, and the lower rows of vent holes 102 all leak out, at which time the air flow rate is reduced to "second largest";
3. by analogy, as shown in fig. 4, the larger the distance that the second orifice plate 2 is moved downward relative to the first orifice plate 1, the larger the number of vent holes 102 on the covered ventilation area 101, the fewer vent holes that can be ventilated, and the air flow rate gradually decreases.
4. As illustrated in fig. 5, the air flow rate is reduced to "zero" when the second orifice plate is moved relative to the first orifice plate to completely cover the ventilation zone 101.
The invention provides the beneficial effects of implementing accurate and uniform air flow regulation by matching the two orifice plates:
1. even air distribution
Because a large number of vent holes are uniformly densely distributed on a plurality of cluster type vent areas on the first pore plate, no matter how many rows of vent holes of the plurality of vent areas are covered by the solid plate area between the air distribution openings of the second pore plate, the plurality of rows of vent holes of the plurality of cluster type vent areas which are not covered and leak out are still uniformly distributed on the whole vent section when viewed from the whole first pore plate area, thereby ensuring the uniformity of air flow;
2. accurate air distribution quantity
A plurality of cluster type ventilation areas are uniformly and densely distributed on the first pore plate, and a certain number of ventilation holes which can be penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device like a sieve mesh;
the number of the ventilation holes is accurately reserved by covering the ventilation holes of a plurality of cluster type ventilation areas on the first pore plate by the solid plate area between the air distribution ports of the second pore plate, so that the air flow can be accurately controlled;
3. small sliding distance and simple driving mechanism
Because the second pore plate with a plurality of large rectangular square holes is adopted to cooperate with the first pore plate with a plurality of cluster type ventilation areas, the ventilation surface where the whole first pore plate is positioned is decomposed into a plurality of repeated 'stepping' areas; therefore, each repeated stepping area (namely the cluster type ventilation area) is narrow when viewed from the sliding direction of the special second orifice plate, thereby bringing the technical effects of small sliding distance and simple driving mechanism.
Example 2
The embodiment provides a high-efficiency dehumidifying and drying device, which comprises an airflow channel with an air inlet and an air outlet, wherein at least one set of dehumidifying and drying unit (heat pump unit) is arranged in the airflow channel, and the dehumidifying and drying unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation; the air inlet is provided with the device for accurately and uniformly adjusting the air flow in the embodiment 1; the wet air enters the channel from the air inlet, is cooled and dehumidified by the evaporator in sequence, is heated by the condenser to become high-temperature dry air, and is discharged from the air outlet.
Under the closed humid environment, like underground shelter, the room that has been soaked by the rainwater etc. when adopting dehumidification drying device to carry out dehumidification stoving operation, need adjust the intake of evaporimeter:
in the middle and later stages of dehumidification and drying, the compression work of a compressor of the dehumidification and drying unit is continuously converted into heat 'clean' input to the closed space since the operation, so that the air temperature in the closed space such as an underground shelter where the dehumidification and drying unit is located, a room soaked by rainwater and the like is slowly increased; meanwhile, due to the continuous operation of the dehumidification drying unit, the water content of the wall body and the ground and the relative humidity of air are reduced to a lower level;
under the condition that the air inlet amount of an evaporator of the dehumidifying and drying device is unchanged, the inlet air temperature is increased and the absolute moisture content in the inlet air is reduced, so that the sensible heat load (heat load released by inlet air temperature reduction) of the evaporator is increased, and the damp heat load (heat load released by condensation of water vapor in the inlet air) is reduced; along with the further increase of the temperature of the inlet air and the further decrease of the absolute moisture content in the inlet air, the sensible heat load of the evaporator is further increased, and the damp heat load is further decreased until all the refrigerating capacity of the evaporator is used for absorbing the sensible heat load, the evaporator can not filter out water, the dehumidification function is stopped, and the dehumidification dryer enters an invalid operation state;
therefore, in the dehumidification and drying operation in a closed environment, the air intake of the evaporator of the dehumidification and drying machine is required to be continuously adjusted from large to small.
In the embodiment, the air inlet of the high-efficiency dehumidifying dryer is provided with the accurate and uniform air flow adjusting device to adjust the air inlet amount of the evaporator; in the closed space, due to the continuous operation of the dehumidification drying process, the inlet air temperature of the dehumidification drying machine is increased, the absolute moisture content in the inlet air is reduced, when the sensible heat load of the evaporator is increased and the damp heat load is reduced, the second pore plate moves relative to the first pore plate, the coverage proportion of the solid part of the second pore plate to the cluster type ventilation area on the first pore plate is gradually increased, the inlet air volume of the evaporator is correspondingly reduced, and therefore the increase of the sensible heat load of the evaporator is restrained, and the damp heat load is stabilized to guarantee the dehumidification capacity of the dehumidification drying machine.
Example 3
Referring to fig. 7-8, the embodiment provides a high-efficiency dehumidifying and drying device, which is particularly applicable to tobacco leaf drying and the like, and comprises a tobacco leaf drying airflow circulation channel 3 with an air inlet 301 and an air outlet 302, and at least one set of heat pump units, wherein each heat pump unit comprises a compressor 9, a condenser 5, a throttling device and an evaporator 6 which are sequentially connected and form a refrigerant circulation; the evaporator 6 is positioned in the ambient air outside the airflow circulating channel 3, and the condensers 5 are positioned in the airflow circulating channel; the air circulation channel 3 is also provided with a moisture exhaust port 11 and a fresh air port 10, and the moisture exhaust port 11 and the fresh air port 10 are both positioned on the air circulation channel 3 between the condenser 5 and the air inlet 301; the moisture exhaust port 11 and the fresh air port 10 are provided with the accurate and uniform air flow rate adjusting device described in embodiment 1.
When the high-efficiency dehumidifying and drying device provided by the invention operates, the evaporator absorbs heat from the mixed airflow of warm and humid outlet air from the moisture exhaust port 11 and ambient air and inputs the heat into the airflow circulation channel again, and because the temperature, the concentration and the enthalpy of the mixed airflow are higher than those of the ambient air, the evaporation temperature, the evaporation pressure, the heating capacity and the heating energy efficiency ratio of the evaporator of the heat pump unit are obviously improved, and the positive feedback circulation of the heat is formed.
In this embodiment, a first fan 4 is disposed in the airflow circulating duct 3 near the air outlet; the first fan 4 is used for pushing the air flow in the air flow circulation passage 1.
In this embodiment, a second fan 7 is disposed on one side of the evaporator 6 for enabling ambient air to smoothly flow through the evaporator 6, and the evaporator absorbs heat from the ambient air and the dehumidified airflow.
In the present embodiment, a third fan 12 is disposed in the air circulation duct 3 near the moisture exhaust port 11, so that part of the humid air is smoothly exhausted from the moisture exhaust port 11 and flows to the evaporator 8.
In this embodiment, a drying space is further included, and the air inlet and the air outlet of the airflow circulation channel 3 are communicated with the drying space to form an airflow closed circulation drying channel, as shown in fig. 7.
In the present embodiment, as shown in fig. 8-10, the first orifice plate on the fresh air inlet 10 and the first orifice plate on the moisture exhaust port 11 are connected together up and down to form a fixed orifice plate 14, the upper side of the fixed orifice plate 14 is provided with a ventilation area 1401 corresponding to the fresh air inlet 10, and the lower side is provided with a ventilation area 1402 corresponding to the moisture exhaust port 11; the second orifice plate on the fresh air opening 10 and the second orifice plate on the moisture exhaust opening 11 are connected up and down to form a movable orifice plate 15, an air distribution opening 1501 opposite to the ventilation area 1401 is arranged on the upper side of the movable orifice plate 15, and an air distribution opening 1502 opposite to the ventilation area 1402 is arranged on the lower side of the movable orifice plate 15.
Further, as shown in fig. 10, the moving orifice 15 is driven synchronously by a driving device 13, the driving device includes a connecting rod 1302 connected to the second orifice, and a power mechanism 1301 for driving the connecting rod to move axially, the power mechanism 1301 may be implemented by a reduction motor or a compressed air cylinder, and the like, which is not limited herein.
In this embodiment, referring again to fig. 8-9, the size of the vent 1403 on the first orifice plate at the moisture exhaust 11 is smaller than the size of the vent 1404 on the first orifice plate at the fresh air opening 10 so that a jet stream of moisture exhaust air flow with a certain dynamic pressure is formed to cover the windward side of the evaporator.
According to the efficient tobacco leaf dehumidifying and drying device provided by the invention, the air inlet 301 and the air outlet 302 are circularly connected with a drying space, when the drying space operates, an evaporator in a heat pump unit firstly absorbs the heat of ambient air and transmits the heat to a condenser through the compressor to heat the circulating airflow in the drying space; the high-temperature circulating airflow in the drying room performs heat and humidity exchange with the tobacco leaves to push the moisture of the tobacco leaves to evaporate to form warm and humid return air; when the wet bulb temperature of the warm and wet return air exceeds the set target value of the baking process, the fresh air port 10 and the moisture exhaust port 11 are synchronously opened, fresh air is supplemented, warm and wet air is exhausted, and under the pushing of the third fan 12, the warm and wet air forms a moisture exhaust air flow jet bundle with a certain dynamic pressure head after passing through a plurality of vent holes on the moisture exhaust port 11 and is ejected to be hit on the windward side of the evaporator.
The invention can regulate and control the quantity and the area of the vent holes of each ventilation area through the sliding of the second pore plate on the first pore plate according to the measured temperature drop speed of the wet bulb in the drying space, thereby regulating the opening degrees of the fresh air inlet 10 and the moisture exhaust port 11:
① when the temperature of the wet bulb drops fast in the drying room, the covering of the vent holes on the first pore plate by the second pore plate is enlarged, the number and the vent area of the vent holes in each vent area are reduced, and the opening degrees of the fresh air inlet 10 and the moisture exhaust port 11 are reduced, so that the moisture exhaust speed is reduced;
② when the temperature of wet bulb decreases slowly during drying, the covering of the second pore plate to the vent holes on the first pore plate is reduced, the number and the ventilation area of the vent holes are enlarged, and the opening degree of the fresh air inlet 10 and the moisture exhaust port 11 is improved, thereby improving the moisture exhaust speed.
Further, the fresh air port 10 and the moisture exhaust port 11 are different in structure in the present embodiment:
① the aperture of the vent hole on the first pore plate of the fresh air inlet 10 is larger, so as to reduce the flow resistance of the fresh air path and enlarge the fresh air inlet volume;
② the aperture of the vent hole on the first pore plate of the moisture exhaust port 11 is smaller to improve the throttle resistance of the moisture exhaust path, under the strong driving of the third fan 12, the warm and humid air flow passes through the vent hole on the first pore plate, and jets into the air suction area of the outer evaporator with higher dynamic pressure head, mixes with the supplemented ambient air, and then uniformly enters the evaporator fin gap to cool, dehumidify and emit heat;
according to the invention, the humidity rate and the humidity removal rate of the flue-cured tobacco house are basically balanced by regulating and controlling the opening degrees of the first pore plate and the second pore plate of the fresh air port 10 and the humidity removal port 11, so that continuous humidity removal and continuous waste heat recovery can be continuously carried out, the wide fluctuation of the dry-wet bulb temperature of the flue-cured tobacco house to a target value is effectively prevented, and the thermal shock of intermittent humidity removal to a heat recovery evaporator is effectively prevented.
The efficient tobacco leaf dehumidifying and drying device provided by the invention has the beneficial effects that:
1. the synchronism of fresh air supplement and external humidity removal of the tobacco curing barn is good
Because the invention adopts the same driving device to regulate and control the opening of the fixed orifice plate and the movable orifice plate on the fresh air port and the moisture exhaust port on the airflow circulating air duct of the tobacco flue-curing house, the fresh air port and the moisture exhaust port on the circulating air duct are synchronously opened and closed, the partial opening of the moisture exhaust port of the fresh air port is also synchronous, and the synchronization of fresh air supplement and external moisture exhaust is good.
2. Even air distribution
Because a large number of vent holes are uniformly densely distributed on a plurality of cluster type vent areas on the fixed orifice plate, no matter how many rows of vent holes of the plurality of vent areas are covered by a solid plate area between air distribution openings of the movable orifice plate, the plurality of rows of vent holes of the plurality of cluster type vent areas which are not covered and leak out are still uniformly distributed on the whole vent section in view of the whole fixed orifice plate area, thereby ensuring the uniformity of air flow;
3. accurate air distribution quantity
A plurality of cluster type ventilation areas are uniformly and densely distributed on the fixed pore plate, and a certain number of ventilation holes which can be penetrated by air flow are distributed in each ventilation area; each ventilation hole is an accurate airflow throttling device like a sieve mesh;
the quantity of the ventilation holes is accurately reserved by covering the ventilation holes of a plurality of cluster type ventilation areas on the first pore plate by moving a solid plate area between the air distribution ports of the pore plate, so that the air flow can be accurately controlled;
4. small sliding distance and simple driving mechanism
Because the movable orifice plate with a plurality of large rectangular square holes is adopted to cooperate with the fixed orifice plate with a plurality of cluster type ventilation areas, the ventilation surface where the whole fixed orifice plate is positioned is decomposed into a plurality of repeated 'stepping' areas; therefore, each repeated stepping area (namely the cluster type ventilation area) is very narrow when viewed from the sliding direction of the moving orifice plate, thereby bringing the technical effects of small sliding distance and simple driving mechanism.
It will be appreciated by those skilled in the art that the invention can be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those precise embodiments, and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (17)
1. An accurate and uniform air flow regulation device, comprising:
a first orifice plate having a plurality of vent areas disposed thereon;
the second pore plate is provided with air distribution ports at positions corresponding to the ventilation areas on the first pore plate, and the air distribution ports can cover the ventilation areas;
the second pore plate and the first pore plate are overlapped, and each air distribution opening corresponds to each ventilation area one by one; the second orifice plate and the first orifice plate can move relatively, and the overlapping part of each ventilation area and the air distribution opening is changed in the relative movement process, so that the adjustment of the air flow is realized.
2. The precise and uniform air flow regulating device according to claim 1, wherein a plurality of said ventilating areas are uniformly distributed along the transverse or longitudinal direction of said first orifice plate, and a plurality of said air distribution openings are uniformly distributed along the transverse or longitudinal direction of said second orifice plate; and the ventilation area and the air distribution opening have the same shape and size.
3. The device for precise and uniform adjustment of the air flow according to claim 2, characterized in that said ventilation zone and said air distribution opening are rectangular.
4. The device for precise and uniform adjustment of air flow according to claim 2, characterized in that the direction of movement between the first orifice plate and the second orifice plate is along the direction of alignment of the ventilation zones.
5. The precise uniform air flow regulation device of claim 4, wherein the spacing between adjacent ventilation zones is equal to the spacing between adjacent air distribution ports;
the distance between the adjacent air distribution openings is larger than or equal to the size of the ventilation area in the moving direction between the first pore plate and the second pore plate.
6. The device for precise and uniform adjustment of air flow according to claim 1, characterized in that at least one ventilation hole is arranged on said ventilation zone.
7. The accurate and uniform air flow regulation device of claim 6 wherein the vent area has at least one row of vents evenly distributed thereon, each row having a plurality of said vents evenly distributed thereon.
8. The device for precise and uniform adjustment of air flow according to claim 1, further comprising a drive device;
the first orifice plate is a fixed orifice plate, the second orifice plate is a movable orifice plate, the fixed orifice plate is fixed on the section of the air channel needing to regulate the air flow, the movable orifice plate is movably arranged on the fixed orifice plate, and the driving device drives the movable orifice plate to move relative to the fixed orifice plate.
9. A high-efficiency dehumidifying and drying device is characterized by comprising an airflow channel with an air inlet and an air outlet, wherein at least one group of heat pump units are arranged in the airflow channel, and each heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation; the air inlet is provided with a device for accurately and uniformly regulating the air flow as claimed in any one of claims 1 to 8;
and moist air enters the airflow channel from the air inlet, sequentially passes through the evaporator for cooling and dehumidifying, is heated by the condenser to become dry air, and is discharged from the air outlet.
10. A tobacco leaf high-efficiency dehumidifying and drying device is characterized by comprising an airflow circulation channel which is used for connecting a heat pump unit and a tobacco leaf drying space and is provided with an air inlet and an air outlet, and at least one group of heat pump units, wherein each heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected and form a refrigerant circulation;
the evaporators are all located in ambient air outside the airflow circulating channel, and the condensers are all located in the airflow circulating channel; the air circulation channel is also provided with a moisture exhaust port and a fresh air port, and the moisture exhaust port and the fresh air port are both positioned on the air circulation channel between the condenser and the air inlet;
the moisture exhaust port and the fresh air port are provided with the device for accurately and uniformly adjusting the air flow as claimed in any one of claims 1 to 8.
11. The efficient tobacco leaf dehumidifying and drying device according to claim 10, further comprising a tobacco leaf drying space, wherein the air inlet and the air outlet of the air circulation channel are communicated with the tobacco leaf drying space to form an air circulation closed circulation drying channel.
12. The efficient tobacco leaf dehumidifying and drying device according to claim 10, wherein the evaporator of the heat pump unit is arranged opposite to the moisture discharging port.
13. The efficient tobacco leaf dehumidifying and drying device according to claim 10, wherein the second orifice plate on the moisture discharging port and the second orifice plate on the fresh air port share one driving device and are driven synchronously.
14. The efficient tobacco leaf dehumidifying and drying device of claim 10, wherein the size of the vent hole of the first pore plate on the moisture discharging port is smaller than the size of the vent hole of the first pore plate on the fresh air port.
15. The efficient tobacco leaf dehumidifying and drying device according to claim 10, wherein a first fan is disposed in the air circulation channel and close to the air outlet.
16. The efficient tobacco leaf dehumidifying and drying device according to claim 10, wherein a second fan is disposed at one side of the evaporator.
17. The efficient tobacco leaf dehumidifying and drying device according to claim 10, wherein a third fan is arranged in the airflow circulating channel and close to the moisture discharging port.
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| CN201911297012.4A CN110895096B (en) | 2019-12-13 | 2019-12-13 | Device for accurately and uniformly regulating air flow and efficient tobacco leaf dehumidifying and drying device |
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| CN201911297012.4A CN110895096B (en) | 2019-12-13 | 2019-12-13 | Device for accurately and uniformly regulating air flow and efficient tobacco leaf dehumidifying and drying device |
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| CN111412547A (en) * | 2020-04-24 | 2020-07-14 | 上海伯涵热能科技有限公司 | Air supply and exhaust module integrated whole-house fresh air system |
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